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The HY-TTC 500 family consists of high-end safety control units designed to satisfy upcoming needs for a wide range of high-end applications like construction and agricultural machines.

The freely programmable high-end controllers with a powerful dual-core ARM Cortex®-R4 lockstep processor are protected by a compact, automotive-style housing suited for harsh environments. The safety controllers fulfill requirements up to SIL 2 (IEC 61508) / PL d (ISO 13849) and can be programmed either in C or in CODESYS®. The safety certified CODESYS® Safety SIL 2 speeds up application validation of the certified controller significantly.

The extensive I/O set with various configuration options makes the HY-TTC 500 control units suitable for a wide range of high-end applications: For example, a group of 8 I/O pins can be individually configured for use as voltage output, digital output or analog input. Another use case is to build up a centralized architecture using one of the HY-TTC 500 safety controllers for the whole vehicle. Commissioning time can be improved by using Ethernet for download and debugging purposes.

The majority of run-time tests that is needed to achieve the diagnostic coverage required for SIL 2 / PL d is performed in hardware by the dual-core lockstep CPU and its safety companion. This ensures that much more processing power remains available for the application in comparison to solutions that implement safety measures in software. The available memory protection mechanisms allow to execute safety and non-safety software on the same safety control unit without interference. The time-consuming validation of non-safe software is therefore no longer necessary. Safe data communication is achieved by the standardized CANopen® Safety protocol of the control units. In case of safety-relevant failure, outputs can be shut-off in 3 groups allowing limp-home functionality.

As an extension of the C-programming environment, the SAFERTOS® integration improves the traditional way of designing and writing an ECU application, allowing the split of the “main loop” user application into multiple working tasks that run until they are interrupted by a higher-priority task, blocked (waiting for an external event) or until a time limit expired. The real-time OS specific functionality has been extended with control application specific features, like run-time separation into safe- and non-safe tasks, a monitoring concept for ensuring timely execution of all tasks and application task ownership of any HY-TTC 500 I/O port used. The efficient inter-task communication and synchronization mechanism using queue implementation permits data to be safely transferred between tasks.

HY-TTC 500 control units are available in three variants, HY-TTC 510, HY-TTC 540 and HY-TTC 580, with different I/O sets and interfaces to meet the different requirements of the OEMs for a high end controller.